研究主題

膠體粒子之泳動
若施加一非均勻場（例如溫度、溶質濃度、電位等）於微、奈米粒子，此非均勻場將與粒子表面交互作用而使粒子運動，這種現象稱為「泳動」，包括帶電粒子之電泳與擴散泳，液滴與氣膠粒子之熱泳以及半滲透囊胞之滲透泳。本研究室目前正在進行各種泳動現象的粒子與粒子間以及粒子與邊界間流體力學交互作用之理論研究。此研究的應用領域可廣及於膠體分離，材料製程，以及生物粒子之運動。

界面高分子之動力學
粒子表面吸附高分子對於控制膠體懸浮液之穩定性與凝聚現象具有重要的影響。進行薄膜分離時，於多孔薄膜吸附高分子則可用以控制其滲透度以及消除孔隙分佈之不良效應。本研究室目前正在進行研究一表面吸附高分子之微、奈米粒子於一細孔中或鄰近於另一粒子時之運動現象。同時進行的研究亦包括一表面吸附高分子電解質之粒子或孔隙的電動力現象。

最新研究

1. Thermophoretic motion of nonspherical aerosol particles (1/3) 非球形氣膠粒子之熱泳 (1/3) Huan J. Keh, sponsored by National Science Council, NSC 97-2221-E-002-075-MY3, NT$ 974,000, 8/1/2008-7/31/2011.

榮譽獎項

1. Outstanding Special-Contract Researcher Award, National Science Council, 2005.

2. Tenured Distinguished Professor, National Taiwan University, 2006-now.

3. Academic Award, Ministry of Education, 2008.

代表著作 所有著作

1. H. J. Keh and Y. C. Chang, “Thermophoresis of an Aerosol Sphere Perpendicular to Two Plane Walls”, AIChE J. 52, 1690-1704 (2006) (SCI, EI).

 

2. Y. C. Chang and H. J. Keh, “Thermocapillary Motion of a Fluid Droplet Perpendicular to Two Plane Walls”, Chem. Eng. Sci. 61, 5221-5235 (2006) (SCI, EI).

 

3. S. Senchenko and H. J. Keh, “Slipping Stokes Flow Around a Slightly Deformed Sphere”, Phys. Fluids 18, 088104-1-4 (2006) (SCI, EI).

 

4. H. J. Keh and Y. L. Li, “Diffusiophoresis in a Suspension of Charge-Regulating Colloidal Spheres”, Langmuir 23, 1061-1072 (2007) (SCI, EI).

 

5. H. N. Unni, H. J. Keh and C. Yang, “Analysis of electrokinetic transport of a spherical particle in a microchannel”, Electrophoresis 28, 658-664 (2007) (SCI).

 

6. H. J. Keh and H. C. Ma, “Diffusioosmosis of Electrolyte Solutions in a Fine Capillary Tube”, Langmuir, 23, 2879-2886 (2007) (SCI, EI).

 

7. S. Senchenko and H. J. Keh, “Thermophoresis of a Slightly Deformed Aerosol Sphere”, Phys. Fluids 19, 033102-1-12 (2007) (SCI, EI).

 

8. H. J. Keh and Y. C. Chang, “Slow Motion of a Slip Spherical Particle in a Circular Cylindrical Pore”, Int. J. Multiphase Flow 33, 726-741 (2007) (SCI, EI).

 

9. H. J. Keh and T. H. Hsieh, “Electrophoresis of a Colloidal Sphere in a Spherical Cavity with Arbitrary Zeta Potential Distributions”, Langmuir 23, 7928-7935 (2007) (SCI, EI).

 

10. H. C. Ma and H. J. Keh, “Diffusioosmosis of Electrolyte Solutions in a Capillary Slit with Adsorbed Polyelectrolyte layers”, J. Colloid Interface Sci. 313, 686-696 (2007) (SCI, EI).

 

11. T. H. Hsieh and H. J. Keh, “Boundary Effects on Electrophoresis of a Colloidal Cylinder with a Nonuniform Zeta Potential Distribution”, J. Colloid Interface Sci. 315, 343-354 (2007) (SCI, EI).

 

12. H. J. Keh and L. R. Wang, “Slow Motions of a Circular Cylinder Experiencing Slip Near a Plane Wall”, J. Fluids Structures 24, 651-663 (2008) (SCI, EI).

 

13. H. J. Keh and Y. W. Wan, “Diffusiophoresis of a Colloidal Sphere in Nonelectrolyte Gradients Perpendicular to Two Plane Walls”, Chem. Eng. Sci. 63, 1612-1625 (2008) (SCI, EI).

 

14. H. J. Keh and L. Y. Hsu, “Diffusioosmosis of Electrolyte Solutions in Fibrous Porous Media”, Microfluidics Nanofluidics 5, 347-356 (2008) (SCI, EI).

 

15. H. J. Keh and Y. C. Chang, “Slow Motions of a Slip Spheroid Along Its Axis of Revolution”, Int. J. Multiphase Flow 34, 713-722 (2008) (SCI, EI).

 

16. H. J. Keh and T. H. Hsieh, “Electrophoresis of a Colloidal Sphere in a Spherical Cavity with Arbitrary Zeta Potential Distributions and Arbitrary Double-Layer Thickness”, Langmuir 24, 390-398 (2008) (SCI, EI).

 

17. H. J. Keh and H. C. Ma, “The effect of Diffusioosmosis on Water Transport in Polymer Electrolyte Fuel Cells”, J. Power Sources 180, 711-718 (2008) (SCI, EI).

 

18. Y. C. Chang and H. J. Keh, “Diffusiophoresis and Electrophoresis of a Charged Sphere Perpendicular to One or Two Plane Walls”, J. Colloid Interface Sci. 322, 634-653 (2008) (SCI, EI).

 

19. H. J. Keh and Y. C. Chang, “Translation and Rotation of Slightly Deformed Colloidal Spheres Experiencing Slip”, J. Colloid Interface Sci. 330, 201-210 (2009) (SCI, EI).

 

20. Y. C. Chang and H. J. Keh, “Thermophoresis of Axisymmetric Aerosol Particles Along Their Axes of Revolution”, AIChE J. 55, 35-48 (2009) (SCI, EI).

 

 

Books

 

1. H. C. Ma and H. J. Keh, “Diffusioosmosis of Electrolyte Solutions”, in New Colloid and Surface Science Research (L. V. Schwartz, ed.), p. 61-129, Nova Science Publishers, Hauppauge, NY (2007) (invited review chapter).